Java
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Java – LinkedHashMap signature
Looking at the JDK source code of LinkedHashMap, I notice that this class is declared as: public class LinkedHashMap&l…… -
Remote virtual machine using vagrant
I want to use vagrant to make the virtual machine run on a more powerful server than my laptop Can I use vagrant remot…… -
Java – Maven cannot find dependencies
I use Maven 3.1 Version 1 I'm trying to compile with dependency springs I see that this should exist in Maven through …… -
Java – get the metadata of the file
Can I know the metadata of a file through Java? If so, how to get the metadata of the file in Java? Solution You can g…… -
Java – “a value of type string cannot be opened below the source level..” error
I am using eclipse to develop a java program I had to downgrade JRE and JDK from 1.7x to 1.6 Now everything points to …… -
How does Java’s dynamic proxy actually work?
I know how to use dynamic proxies in Java, but what I don't understand is how VM actually creates dynamic proxies Does…… -
Java – how to set the ForeignKey name when I have @ manytomany
I am using JPA class to create database If we have a manytoone relationship, we can override the ForeignKey name, as s…… -
Java – JPA POJO as data object
What are the best practices for using JPA entities? Since the JPA entity is only a POJO, is it appropriate to use this…… -
Jpa-2.0 – execute @ postload_ after_ Eagerly extract?
Using JPA2 / Hibernate, I created an entity a with a one-way mapping to entity x (see below) In a, I also have a tempo…… -
How do I register JavaScript callbacks in a java applet?
I'm developing an invisible Java applet that will be completely controlled by JavaScript I can easily call the Java me…… -
Java – how to disable errorpagefilter in spring boot?
I am creating a soap service that should run on Tomcat @Configuration @EnableAutoConfiguration(exclude = ErrorMvcAutoC…… -
Java – automatically redirect from one JSP page to another
Once the home page is loaded, can users be automatically redirected to the second JSP page@ H_ 502_ 2@ resolvent Solut…… -
Using Java’s recursive expression evaluator
I want to write an expression evaluator that only does addition and subtraction I have a simple algorithm to do this; …… -
Java – does JSF use JSP?
I'm learning JSF and I have some questions I know JSF is a UI framework for making pages. I'm using it and successfull…… -
Java – error adding edit text in eclipse
I'm building Android apps for tablets I tried to add an EditText in the graphical view of eclipse, but when I selected…… -
Java – what is the meaning of the three points in the function parameters?
There is already an answer to this question: > java, 3 dots in parameters8 private class DownloadFilesTask extends …… -
Java – how does akka implement the relationship before JMM?
In the official akka document, they refused: For details, please refer to the doc I wonder how akka did it I just pass…… -
Java – what are the benefits of extending generics by specifying new types as the actual types of generics
I saw this pattern somewhere: @ h_ 403_ 2@class A extends B { } This structure is somewhat unusual for extending gener…… -
Java – JPA: @ primarykeyjoincolumn (…) and @ joincolumn (…, insertable =?, updatable =?) Same?
It can be derived from the JPA specification if there is no @ primarykeyjoincolumn (...) with pluggable and updatable …… -
Java – how do I get the hashtable value as an ArrayList?
Hashtable How to convert its value to: ArrayList <Word> arr thank you. Solution Use the ArrayList constructor t…… -
How to install the gson module in Java?
I downloaded the Google JSON module a.k.a gson I am a Windows system. Can you tell me how to install the gson module? …… -
Java – spring data dynamic query
I am using spring data to set up a dynamic query. Basically, I have an array with a series of features. I need to comb…… -
Can the Java – pluggable annotation processor API retrieve source code annotations?
I am using the pluggable annotation processing API with Java 6 to automatically create some deployment XML files Some …… -
Copying fields between classes in Java
I have a pair of classes. The field of one class is a subset of the field of the other. The getters of superset classe…… -
Java introspection – strange behavior
The following code is a small example that can easily reproduce the problem So I have a variable of type string and se…… -
Java – where to run complex algorithms? Server or client?
I'm trying to develop a social network Android application with a huge user database I am very new to android app deve…… -
Java – save files to SharePoint Server using jax-ws
I tried to save a file to a SharePoint Server using Jax - WS The web service call reports success, but the file is not…… -
Java – why is maptoint() not in the optionalint class?
The intstream class has map(), maptoobj(), maptolong() and maptodouble() methods, but these methods seem to be missing…… -
Java – what is the best way to find all addresses at a specific distance from the selected point?
I'm developing an application that should display addresses in specific locations I know how to find the distance betw…… -
Removes a specific character from a string in Java
For example, when we specify the character to be deleted as aeiou, we give a string of "vowel war": Hawaii vs. groney,…… -
Java – application engine data storage: how to implement posts and tags without connection?
I am building an application in Google App Engine (Java) where users can post. I am considering adding tags to these p…… -
Java – the job gives an unexpected answer
Today, I encountered the following problems, and I can't seem to find a solution: int i,j,k; i = j = k = 3; i = k++;……